Vehicle brake testing appliance



March 1, 1932. c. HALL 1,847,511

VEHICLE BRAKE TESTING APPLIANCIE.

Filed Feb. 17. 1931 s sheets-sheet 1 Inventor 1 By @u' Attorney March 1, 1932. C. HALL 1,847,511

VEHICLE BRAiKE TESTING APPLIANCE Filed Feb. 17. 19:51 5 Sheets-Sheet 2 N Inventor /U {Mr/cs .19/

A Home y March 1, 1932. C. HALL I 1,847,511

EHILE BRAKE TESTING APPLIANCE Filed Feb.'1'7. 1951 s sheets-sheet 3 Allorney Patented Mar. l, 1932 CHABLIS HALL, F COBLESKILL, NEW YORK r vmcLE anni: TESTING arrLmNcn Application led February 17, -i981. Serial No. 516,485.

AThis invention relates to an improved automotive appliance which may be generally referred to as a brake tester susceitible of usein testing either mechanical or uid brakes. More specifically stated, thevinventive conce tion comprehends` a device which is appllcable to the wheel when the wheel is jacked up so as to accurately measure the pressure necessary to turn the wheel while the brake pedal is applied, thus permitting the appliance, when in the hands o f a practical mechanic to be accurately tested for subse uent tightening'and adjustment.

rieiiy stated,l the' structure comprises. a harness which ma be applied to the wheel, said harness inclu ing a part to accommodate a wheel turning Wrench and the wrench being of a duplex type land including a pressure j gauge whose readings determine pressure o necessary to rotate the wheel and in this way permit accurate checking of all of the wheels on the vehicle one with respect to the other for systematic-and sensitive adjustment.

More explicitly recited, the so-called har ness is characterized by a multiplicity of chains which securely embrace the tire and wheel, said chains being anchored on a hub shield, said shield being"pocketed to accominodatethe wheel turning and gauging wrench.

-Novelty is predicated upon this particular harness constructionnd the duplex sim-l plified gauge equipped wrench'.

In the drawings:

Figure 1 is a side elevational view of a vehicle wheell with the appliance mounted thereon for usage, the wheel being shown as jacked up.

Figure 2 is an enlarged fragmentary sectional and elevational view ot' the wrench removed.

shield.

shield shown in Figure 3.'-

Figure`5 is a top planview of the gauging and turning wrench. j Figure 6-is a perspective view of the turning'lever of the wrench.

- 45- Figure 4 is an edge elevation of the'same Figure 7 is detail view on the line 7-7 of Figure 5.

-Figure 8 is a fragmentary elevational view of the gauge. r Figure 9 is an inside elevational view of the u vehicle wheel showing the inner chain ensemble.

In Figure 2, the wheel, which is conventional, is designated by the numberal 10, the tire is indicated at 10, the brake drum at 12, no and the hub cap and hub structure at 13.

In accordance with the present invention, I provide a wrench attaching device which is fastened to the wheel and the device is gen- .,erally denoted by the numeral 14 and is here el `shown in the form of a substantially bellshaped plate. This/includes a body portion 15 which is shaped to embrace but not touch the hub, thus permitting the device to serve as a shield.` u

.There is a marginal" flange at 16 having a plurality of apertures 17. The central portion of the body is thickened in proportion as indicated at 18 andprovided with a polygonal Wrench socket 19. This device 14 con-V75 stitutes the salient part 0f the so-called harness. The remainder of the harness is made up of a plurality ofv chains resembling an ordinary anti-skid chain construction.

For example, as `shown in Figure 9, the so inside chains are represented by the numeral 20 and are joined togethenbya.hook 21 so that they assume a somewhat rectangular layout.'

Attached to these are three tread chains indicated -by the numerals v2, these having their outer ends fastened permanently to the holes or apertures 17 inthe ilange' 16. The remaining tread chainsdistinguished by the reference character 23 occupy the position'w shown in Figure 2 and terminate in a hook 24:

, vt 't t b 't Figure- 3 is a Side elevatlo-n of the hub o permit 1 to be adjus a ly connected w1 h the links of the short connectin chain This permits secure anchoragero the chalns on the tire and also insures proper main= 9c 'tenance of the device 14 so that the .entire structure thus saddled on the wheel will bind l sufliciently to cause the wheel to turn therewith. j j

This turning is accomplishedl through the l 65 in such a way as to grip casing 30 with suitable indicating means and a housing- 31 to accommodate the internal pressure spring 32.' This spring has a connecting and operating rod 33 connected therewith and also connected with the adjacent end portion 34 of the operating lever 35.

It will be observed that the inner end of this-lever `is provided with attaching ears 36 which straddle and are pivotally connected with the shank 27 at a point adjacent'the 20 head 28.

In operation, the wheel turning harness is applied to the wheel by assembling the chains over the tire somewhat in the same manner as applying anti-skid chains. The cup-like or bell-shaped socket device 14 1s applied on the outside of the wheel4 and in spaced relation to the hub structure. Then either of the ends y28 .of the head of the wrench 26 is slipped into'the socket 19. This couples the wrench 30 to the plate device 14 for rotating said device. The operator 'catches hold of the lever 35 moving. it downwardly until it assumes the dotted line position shown in Figure l. At a predetermined time and when the requisite pressure is reached, the wheel will turn. The pressure indicated on the dial will suffice to enable the-user to determine how much pressure is necessary to rotate this wheel.

Of course, in making this wheel test to I v40 determine brake pressure, it is necessary that the brake pedal (not shown) be held down, v either by a mechanical device, or another attendant. In other words, the brakes are j applied while the testing'device just described` .15 is used.

v Under this arrangement, and by skillful handling, it is possible to compare the relative turning pressures. of the wheels in a systematic manner for checking the brakes and rmaking subsequenty adjustments whenever necessary.

The essential factors of the invention are 'as follows. A suitable mechanical device must be provided for application to the wheel the wheel, and this device should include, in accordance with the present inventive conception, accommodate the wrench so as to permit ythe wheel attached device to turn with the wrench '30' at a predetermined pressure.

The wrench is gauge-equipped, that is,

. provided'itself with a` gauge, said gauge being mounted on one part and operatively connected to the lever2 and the lever being pivotan element to It is thought that the description, taken in .connection with the drawings will enable a clear understanding of the invention to be had. Therefore, a more lengthy description is thought unnecessary.`

While the preferred embodiment of the invention has been shown and described, it is to be understood that minor changes coming within the field of invention claimed may be resorted to in actual practice if desired, without departing from the spirit and scope of the appended claims.

I claim:

1. In an appliance of the class described, a hub shield comprising a bell-shaped plate having a marginal apertured flange and a centralized thickened portion formed with a polygonal socket, and a multiplicity of adjustable wheel embracing chains connected with the apertured portion of said iiange.

2. In an appliance of the class described,v s

a hub shield comprising a bell shaped plate having a marginal apertured iange and a centralized thickened portion formed with a socket, a lmultiplicity of adjustable wheel embracing chains connected with the apertured portion of said flange, and a wrench comprising a shank and a head, and adapted to be inserted in said socket, a gauge carried by said shank, and a lever pivotally mounted on the shank and operatively connected to v the gauge.

"In testimony whereof I affix my signature.

oHARLEs HALL.

'a-lly connected with the first named part, 

